@article{10_4153_CJM_2003_004_x,
     author = {Choi, Man-Duen and Li, Chi-Kwong and Poon, Yiu-Tung},
     title = {Some {Convexity} {Features} {Associated} with {Unitary} {Orbits}},
     journal = {Canadian journal of mathematics},
     pages = {91--111},
     year = {2003},
     volume = {55},
     number = {1},
     doi = {10.4153/CJM-2003-004-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-2003-004-x/}
}